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Display Data Channel (DDC) is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.
The data is transmitted via the cable connecting the display and the graphics card; VGA, DVI, DisplayPort and HDMI are supported. [ citation needed ] The EDID is often stored in the monitor in the firmware chip called serial EEPROM (electrically erasable programmable read-only memory) and is accessible via the I²C-bus at address 0x50 .
Apple Inc. Lenovo, HP, and Dell systems and monitors ATI RV670 based graphics cards and NVIDIA G92 graphics cards (both as OEM optional implementations) DisplayPort introduced the 128-bit AES to replace HDCP. DisplayPort version 1.1 added support for HDCP. DiiVA: 2008: 13-pin Digital: 2560 × 1600 @ 75 4096 × 2160 @ 24: A/V systems
The compact size lets a low-profile card support two high resolution displays, and a full-height card (with two DMS-59 connectors) up to four high resolution displays. The DMS-59 connector was used by e.g. AMD , Nvidia and Matrox for video cards sold in some Lenovo ThinkStation models, Viglen Genies and Omninos, Dell, HP and Compaq computers.
HDMI 1.4b was released on October 11, 2011, [110] containing only minor clarifications to the 1.4a document. HDMI 1.4b is the last version of the standard that HDMI LA is responsible for. All later versions of the HDMI Specification are produced by the HDMI Forum, created on October 25, 2011. [34] [111]
Miracast is "effectively a wireless HDMI cable, copying everything from one screen to another using the H.264 codec and its own digital rights management (DRM) layer emulating the HDMI system". The Wi-Fi Alliance suggested that Miracast could also be used by a set-top box wanting to stream content to a TV or tablet.
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Examples of computer connector sockets on various laptops Ports on the back of the Apple Mac Mini (2005) A computer port is a hardware piece on a computer where an electrical connector can be plugged to link the device to external devices, such as another computer, a peripheral device or network equipment. [1] This is a non-standard term.